Study of B0→D* -π+π-π+ and B0→D*-K+π-π+ decays

The LHCb Collaboration

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Using proton-proton collision data collected by the LHCb experiment at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb -1, the ratio of branching fractions of the B0→D* -π+π-π+ decay relative to the B0→D*-π+ decay is measured to be B(B0→D*-π+π-π+) B(B0→D*-π+)=2.64±0.04(stat)±0. 13(syst). The Cabibbo-suppressed decay B0→D*-K +π-π+ is observed for the first time, and the measured ratio of branching fractions is B(B0→D* -K+π-π+)B(B0→D* -π+π-π+)=(6.47±0. 37(stat)±0.35(syst))×10-2. A search for orbital excitations of charm mesons contributing to the B0→D* -π+π-π+ final state is also performed, and the first observation of the B0→D̄1 (2420)+π- decay is reported with the ratio of branching fractions B(B0→(D̄1 (2420)0→D*-π+) π-π+)B(B0→D*-π +π-π+)=(2.04±0.42(stat)±0. 22(syst))×10-2, where the numerator represents a product of the branching fractions B(B0→D̄1(2420)-π+) and B(D̄1 (2420)0→D*-π+).

Original languageEnglish
Article number092001
Number of pages10
JournalPhysical Review D
Issue number9
Publication statusPublished - 3 May 2013
Externally publishedYes

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